<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <meta content="text/html;charset=utf-8" http-equiv="content-type"/>
    <title>Hello CSS!</title>
    <style type="text/css">
        a {
            color: red;
        }

        a:hover {
            color: blue;
        }
    </style>
</head>
<body>
<p class="one">AAA</p>
<p class="two">BBB</p>
<span>CCC</span>
<p pb="third">DDD</p>
<a href="https://www.baidu.com/">Baidu</a>
</body>
</html>
